Bess Koffman - A Speck of Dust

A couple of years ago US scientist Bess Koffman travelled to New Zealand to research whether or not new Zealand dust influenced the last Ice age - and if a tiny speck of dust has the potential to change the earth's climate. Bess Koffman did this research as Postdoctoral Research Fellow at Columbia University and she is now at Department of Earth Sciences, Dartmouth College.